1. October 12, 2011 At the end of today, you will be able to: Draw scatter plots to find and use prediction equations. Warm-up: 1.Write an equation of a line that is perpendicular to y = 2x – 4. 2.Write an equation of a line that passes through the points (7,1) and (7,8) HW 2.5: 2.5 Worksheet

2. Correct HW 2.4 14. m = 3/4, b = 050. $11.75 16.m = -3/5, b = 661. No solution 18.m = -c, b = d 20.y = (-5/3)x + 29/3 22.y = 2 23.Y = 3x – 6 25. Y = (-1/2)x + 7/2 35. Y = (2/3)x + 10/3 36.Y = -4x + 3 49. Y = 0.35x + 1.25

3. Lesson 2.5 Using Scatter Plots The table shows the median selling price of new, privately- owned, one-family houses for some recent years. Make a scatter plot of the data. a)Draw a scatter plot. b)Use two ordered pairs to write a predication equation. c)Use your prediction equation to predict the median price in 2010 Year 1990199219941996199820002010 Price $1000 122.9121.5130.0140.0152.5169?

5. Regression Line or Line of Best Fit in your Calculator Enter the points in a table - STAT, 1: Edit In column L1, enter all the x values In column L2, enter all the y values To Find Regression Line - STAT,  CALC, 4: LinReg(ax + b), ENTER

6. Bike Weights and Jump Heights You need: Graph paper Ruler or a Straight edge